81738847980

Names of 81738847980

• Cardinal: 81738847980 can be written as Eighty-one billion, seven hundred thirty-eight million, eight hundred forty-seven thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 8.173884798 × 10¹⁰

Factors of 81738847980

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 362

Divisors of 81738847980

• Number of divisors d(n): 252
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 71 81 90 108 135 142 162 180 213 243 270 281 284 324 355 405 426 486 540 562 639 710 729 810 843 852 972 1065 1124 1215 1278 1405 1420 1458 1620 1686 1917 2130 2430 2529 2556 2810 2916 3195 3372 3645 3834 4215 4260 4860 5058 5620 5751 6390 7290 7587 7668 8430 9585 10116 11502 12645 12780 14580 15174 16860 17253 19170 19951 22761 23004 25290 28755 30348 34506 37935 38340 39902 45522 50580 51759 57510 59853 68283 69012 75870 78961 79804 86265 91044 99755 103518 113805 115020 119706 136566 151740 157922 172530 179559 199510 204849 207036 227610 236883 239412 258795 273132 299265 315844 341415 345060 359118 394805 399020 409698 455220 473766 517590 538677 598530 682830 710649 718236 789610 819396 897795 947532 1024245 1035180 1077354 1184415 1197060 1365660 1421298 1579220 1616031 1795590 2048490 2131947 2154708 2368830 2693385 2842596 3232062 3553245 3591180 4096980 4263894 4737660 4848093 5386770 5606231 6395841 6464124 7106490 8080155 8527788 9696186 10659735 10773540 11212462 12791682 14212980 14544279 16160310 16818693 19187523 19392372 21319470 22424924 24240465 25583364 28031155 29088558 31979205 32320620 33637386 38375046 42638940 48480930 50456079 56062310 57562569 58177116 63958410 67274772 72721395 76750092 84093465 95937615 96961860 100912158 112124620 115125138 127916820 145442790 151368237 168186930 191875230 201824316 230250276 252280395 287812845 290885580 302736474 336373860 383750460 454104711 504560790 575625690 605472948 756841185 908209422 1009121580 1151251380 1362314133 1513682370 1816418844 2270523555 2724628266 3027364740 4086942399 4541047110 5449256532 6811570665 8173884798 9082094220 13623141330 16347769596 20434711995 27246282660 40869423990 81738847980
• Sum of all divisors σ(n): 261916499376
• Sum of proper divisors (its aliquot sum) s(n): 180177651396
• 81738847980 is an abundant number, because the sum of its proper divisors (180177651396) is greater than itself. Its abundance is 98438803416

Bases of 81738847980

• Binary: 1001100001000000000111101011011101100₂
• Hexadecimal: 0x130803D6EC
• Base-36: 11JT76R0

Squares and roots of 81738847980

• 81738847980 squared (81738847980²) is 6681239269097550080400
• 81738847980 cubed (81738847980³) is 546116800934770957812252377592000
• The square root of 81738847980 is 285900.0664218181
• The cube root of 81738847980 is 4339.8645072979

Scales and comparisons

• 81,738,847,980 seconds is equal to 2,599 years, 2 weeks, 1 day, 11 hours, 33 minutes.
• To count from 1 to 81,738,847,980 would take you about five thousand, one hundred ninety-eight years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81738847980 cubic inches would be around 361.7 feet tall.

Recreational maths with 81738847980

• 81738847980 backwards is 08974883718
• The number of decimal digits it has is: 11
• The sum of 81738847980's digits is 63
• More coming soon!